May weather forecast
Lancaster, TX

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Weather in May

May, the last month of the spring in Lancaster, is another warm month, with an average temperature ranging between max 81.3°F (27.4°C) and min 64°F (17.8°C).

Temperature

The commencement of May sees a minor shift in the average high-temperature, moving from a moderately hot 74.8°F (23.8°C) in April to a still warm 81.3°F (27.4°C). During the month of May, the nighttime temperature in Lancaster falls to an average of 64°F (17.8°C).

Heat index

The heat index value for May is computed to be a tropical 86°F (30°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.
Observations indicate that the heat index values are for shady locations with light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.

Humidity

May is the most humid month, with an average relative humidity of 75%.

Rainfall

The month with the most rainfall in Lancaster, Texas, is May, when the rain falls for 11.5 days and typically aggregates up to 2.05" (52mm) of precipitation.

Snowfall

In Lancaster, snow does not fall in March through December.

Daylight

In Lancaster, the average length of the day in May is 13h and 51min.
On the first day of the month, sunrise is at 6:39 am and sunset at 8:08 pm. On the last day of May, sunrise is at 6:20 am and sunset at 8:29 pm CDT.

Sunshine

The average sunshine in May is 8.7h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index in Lancaster. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in May translates into the following instructions:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What are the temperatures in Lancaster in May?

During May, Lancaster experiences an average high-temperature of 81.3°F (27.4°C) and a low-temperature of 64°F (17.8°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in May is computed to be 86°F (30°C).

What is the most humid month in Lancaster?

The most humid month in Lancaster is May, with an average relative humidity of 75%.

What is the average humidity in May in Lancaster?

In May, the average relative humidity in Lancaster is 75%.

What is the wettest month in Lancaster?

May is the month with the most rainfall in Lancaster, Texas. Rain falls for 11.5 days and accumulates 2.05" (52mm) of precipitation.

How much does it rain in Lancaster in May?

In Lancaster, during May, the rain falls for 11.5 days and regularly aggregates up to 2.05" (52mm) of precipitation.

When it does not snow in Lancaster?

March through December are months without snowfall.

What is the average length of the day in May in Lancaster?

The average day length in May in Lancaster is 13h and 51min.

When is the sunrise / sunset in May in Lancaster?

On the first day of May, sunrise is at 6:39 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 8:29 pm CDT.

How long on average sun shines in May in Lancaster?

In May, the average sunshine duration in Lancaster is 8.7h.

What are the months with the highest UV index in Lancaster?

May through August, with an average maximum UV index of 7, are months with the highest UV index in Lancaster, Texas.

What is the UV index reading in May in Lancaster?

The average daily maximum UV index in May in Lancaster is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Lancaster, TX

Average temperature in May - Lancaster, TX
  • Average high temperature in May: 81.3°F

The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is January (54.9°F).

  • Average low temperature in May: 64°F

The month with the highest average low temperature is August (76.1°F).
The coldest month (with the lowest average low temperature) is January (39°F).

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Average pressure in May
Lancaster, TX

Average pressure in May - Lancaster, TX
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in May
Lancaster, TX

Average wind speed in May - Lancaster, TX
  • Average wind speed in May: 8.8mph

The windiest month (with the highest average wind speed) is March (9.9mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).

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Average humidity in May
Lancaster, TX

Average humidity in May - Lancaster, TX
  • Average humidity in May: 75%

The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (58%).

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Average rainfall in May
Lancaster, TX

Average rainfall in May - Lancaster, TX
  • Average rainfall in May: 2.05"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is February (0.71").

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Average rainfall days in May
Lancaster, TX

Average rainfall days in May - Lancaster, TX
  • Average rainfall days in May: 11.5 days

The month with the highest number of rainy days is September (12.5 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in May
Lancaster, TX

Average snowfall in May - Lancaster, TX
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in May
Lancaster, TX

Average snowfall days in May - Lancaster, TX
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Lancaster, TX

Average daylight in May / Average sunshine in May - Lancaster, TX
  • Average daylight in May: 13h and 5min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in May: 8h and 4min

The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in May
Lancaster, TX

Average sunshine days in May - Lancaster, TX
  • Average sunshine days in May: 16 days

The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is September (14.8 days).

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Average UV index in May
Lancaster, TX

Average UV index in May - Lancaster, TX
  • Average UV index in May: 7

The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in May
Lancaster, TX

Average cloud cover in May - Lancaster, TX
  • Average cloud cover in May: 36

The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in May
Lancaster, TX

Average visibility in May - Lancaster, TX
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Lancaster, Texas, USA

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